20x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 6 Pack Odor Control • Measures conductivity and temperature

• Measures conductivity and temperature

Apply as a foliar spray using standard spray equipment

Bloom FX can be used in both soil and hydroponic systems

Place your PotPro™ 8" Cube into the Pot

Nordic Pure 20x20x4 Plus Carbon Air Filters MERV 8 are made of a dual material where the MERV rated material has been fused together with a carbon layer

20x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 6 Pack Odor Control • Measures conductivity and temperatureImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 20x20x4 filter